<template>
<van-button
            v-if="isFollowed"
            class="follow-btn"
            round
            size="small"
            :loading="followLoading"
            @click="onFollow"
          >已关注</van-button>
          <van-button
            v-else
            class="follow-btn"
            type="info"
            color="#3296fa"
            round
            size="small"
            icon="plus"
            @click="onFollow"
            :loading="followLoading"
          >关注</van-button>
</template>

<script>
import { addFollow, deleteFollow } from '@/api/user'

export default {
  name: 'FollowUser',
  model: {
    prop: 'isFollowed', // 默认是 value
    event: 'update-is_followed' // 默认是 input
  },
  props: {
    isFollowed: {
      type: Boolean,
      required: true
    },
    userId: {
      type: [Number, String, Object],
      required: true

    }
  },

  data () {
    return {
      loading: false,
      followLoading: false
    }
  },
  methods: {
    // 关注和取消关注
    async onFollow () {
      this.loading = true // 展示关注按钮的loading
      try {
        if (this.isFollowed) {
        // 已关注，取消关注
          await deleteFollow(this.userId)
        } else {
          await addFollow(this.userId)
        }
        // 更新视图状态
        // this.article.is_followed = !this.article.is_followed
        this.$emit('update-is_followed', !this.isFollowed)
      } catch (error) {
        console.log(error)
        let message = '操作失败，请重试'
        if (error.response && error.response.status === 400) {
          message = '你不能关注你自己！'
        }
        this.$toast(message)
        this.loading = false // 展示关注按钮的loading状态
      }
    }
  }
}
</script>

<style scoped lang="less">
</style>
